Question

If -5+iα, -5+iβ (where α²≠β²; α, β∈ R and i²=-1) are roots of x³ + 15x² + c x + 860 = 0, c∈R, Then
(A) c=222
(B) all three roots are imaginary
(C) two roots are imaginary but not complex conjugate of each other
(D) -5+7i√3, -5-7i√3 are imaginary roots
Please give the solution with explanation

Answer 1

Answer:

If -5+iα, -5+iβ (where α²≠β²; α, β∈ R and i²=-1) are roots of x³ + 15x² + c x + 860 = 0, c∈R, Then

(A) c=222

(B) all three roots are imaginary

(C) two roots are imaginary but not complex conjugate of each other

(D) -5+7i√3, -5-7i√3 are imaginary roots

Please give the solution with explanation

Answer 2

Answer:

The cost price of item B is Rs. 200/- more than the cost price of item A. Item A was sold at a profit of 20% and item B was sold at a loss of 30%. If the respective ratio of selling prices of items A and B is 6 :7, what is the cost price of item B?

Wrong answers Only....

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